Dental plugger



(No Model.)

A. C. GREENLEE.

DENTAL PLUGGER.

Patented May 24, 18847.

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UNITED STATES PATENT OFFICEo ARTHUR C. GB'EENLEE, OF FERGUS FALLS,MINNESOTA. I

DENTAL PLUGGER.

SPECIFICATION forming part of Letters Patent No. 363,630, dated May 24,1887.

Application filed December 6, 1886. Serial No. 220,5?9.` (No model.)

.To all whom, it may concern:

Be itknown that I, ARTHUR C. GREENLEE, a citizen of the UnitedStates,residing at Fergus Falls, in the county of Otter Tail and State ofMinnesota, have invented a new and useful Attachment for the Dental Engine-viz., a Right-Angled Plugger--of which the following is aspecification.

My invention relates to an improvement in the attachments of the dentalengine which are commonly used for inserting the filling of teeth 5 andthe objects of my invention are, first, to provide au attachment for thedental engine which shall fill a tooth by means of blows delivered atright angles to the driving' shaft; second, to provide an attachment forthe dental engine which shall operate at any reentrant angle betweenninety degrees and sixty degrees inclination to the driving-shaft;third, in such a right-angled dental plugger to provide a means forholding theplugging-shaft at any required inclination to theoperating-shaft; fourth, to provide in such a right-angled plugger acombination of mechanism which shall convert the rotary motion of theshaft driven by the dental engine into a reciprocating motion of theshaft which Vcarries the pluggingtool; iifth, in such a right-angleddental plugger to provide a means for regulating the length of thestroke of the reciprocating bar or shaft which carries theplugging-tool; sixth, in such a right-angled dental plugger to provide ameans for regulating the force of the blows which are to be given bysaid plugger; seventh, in such a right-angled dental plugger toprovide-a means for keeping the follower atv tached to theplugging-shaft in constant coutact with the cam which operates the same.I attain these objects by means of the mechanism illustrated in -theaccompanying drawings, in which- Figure 1 is a vertical section of theentire` machine, and Fig. 2 a view of the workingcam B.

The handle T, to which are riveted or fastened in any substantial mannerthe hanger N and the cylindrical tube K, oscillating upon journals M,which are supported upon opposite sides of said cylindrical tube inholes in the hanger N, constitutes the frame-work of the machine.

The cylinder K, which contains the plugging-shaft,is held at rightangles to the operating-shaft A by means of the brace O, which isattached, by a ball-and-soeket joint, S, at the end next theplugger-cylinder, to the adjusting-nut G, whose use will be hereinafterexplained, and at the other end carries the pin P, which slides in thespiral groove Q of the collar R, the lower end of said brace O slidinglongitudinally in a slot cutin the hanger N.

In the handle T the operating-shaft A revolves, which is connected tothe dental engine, and has the cam B attached to it. Against theperiphery of this cani B the arm or follower C, rigidly attached to theplugger-shaft D, is held in contact by the spiral spring E, the actionof such combination being that as the cani Bis revolved the follower Cis brought to the point U and the spring E is compressed. A furtherrevolution of the cam B releases the follower C from contact therewith,and the pressure on the spring E being removed, the plugging-shaft D,with its tool J and arm or follower C, is projected through the distanceU V,When the follower C again comes in contact with the cam B.ThecylinderK is moved to a position at any desired angle between arightangle and one of sixty degrees inclination to the operating-shaft byturning the collar R, which causes the pin P, and with it the brace O,to be raised or lowered. The collar R is constructed to it very closelyaround the hanger N,so that it will remain in any required position,thus holding the brace O, and with it the cylinder K,in the positiondesired by the operator until the collar R is again rotated.

The dotted iigure of the plugger-cylinder, as shown by S D in Fig. 1,illustrates the position of the said cylinder when inclined atan angleof sixty degrees to the operating-shaft.

The length of stroke U Vmay be shortened or subdivided by turning theVadj Listing-nut I in such a way as to move the buffer-block H to theleft, as shown in Fig. 1, so that-,instead of being stopped at V by thecam B, the plugger-shaft may be stopped by the collar XV strikingagainst the buffer-block H.

To decrease the force of the blow of the plugger, thecompression-bloek Fmay be moved toward the left, as shown in Fig. 1, by turning theadjusting-nut G, thusdecreasing the IOO pressure upon the spring E andthe force of the blow delivered by the pluggcr; or it may be moved tothe right by turning the nut G in the opposite direction, thuscompressing the spring E, with which the shaft D is propelled uponreleasing the follower C from contact with the cam B.

As the cylinder K is moved into position shown by the dotted lines, thefollower C will be thrown out of contact with the cani B, and to bringthem again in contact the compression block F is pushed down toward theright by turning the adjusting-nut G until the follower C strikes thecam B at V and the required ten! sion upon the'spring E is obtained. Atthe saine time the buffer-block H is drawn down Y toward the right untilthe collar \V just comes in contact therewith.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In ariglit-angled dental plugger, the combination of the handle T,hanger N, journals M, plugger-cylinder K, slotted at L, operating-shaftA, rotating cam B, follower C, plugvger-shaft D, spring E, tensionblockF, adjusting-block G, ball-andsoeket joint S, and arni O, longitudinallyplaced in a slot in the `hanger N'and bearing a pin, l?, allsubstantially as described.

2. In a dental plugger, the combination of the collar It, closelyencircling hanger N and arm O, and having a spiral slot,Q,cut therein,the pin I?, attached to the arm O, constructed to travel in slot Q,joint S,and the journals M, supporting cylinder K in the hangerN,wherebythe angle of the plugger to the operating-shait may be varied,substantially as described.

3. In a dental plugger, the combination ot' 'a shaft, A, the cam B,follower C, attached to plugger-shaft D, spiral spring E, andcornpression-bloek F, substantially as shown, and for the purposespecified.

4. In a dental plugger, the combination of a cylinder, K,abuffer-bloclr, H, constructed to slide in a slot, L, in the upperportlon of the hanger N, and the adjusting-,nut I, revolving in thecylinder K, substantially as de scribed. 1

5. In a dental plugger, the combination of the cylinder K, acompression-block, F, sliding in a slot, L, in the upper portion of thehanger N, andthe adj Listing-nut G, rotating 1n the cylinder K,substantially as described.

Gf In a dental 'pluggen the combination of a cylinder, K,compressionblock F, adjustingnut G, buffer-block H, and adjustingnut I,substantially as and for the purposes specilied.

ARTHUR C. GREENLEE. Vitnesses: t

AUeUsTUs J. ELKINs, HARRY SvENsGAAnD.

